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SubjectPROBLEM: HomePNA driver causes kernel panic
[DESCRIPTION]
I have a Linksys "HomeLink Phoneline 10M Network Card" installed in my
machine. This enables a HomePNA network, which connects machines though
the telephone wiring in a building.

After a short period of traffic on this card, there is a kernel panic.
To me, the problem appears random, ie, I cannot predict how much network
traffic will cause the problem. The problem does not occur when I use
an older kernel.


[KEYWORDS]
modules, networking, kernel, hpna, il


[KERNEL VERSION]
versions with problem: 2.4.8-26mdk (from Mandrake 8.2)
2.4.18-3 (from Redhat 7.3)
version without problem: 2.4.3-20mdk (from Mandrake 8.0)


[OUTPUT]
I recorded this output from the 2.4.8-26mdk kernel:

KERNEL: assertion (atomic_read(&skb_users) ==0) failed at dev.c(1332):net_tx_action

(repeats several times, then...)

Warning: kfree_skb passed an skb still on a list (from c01c8f15).
Kernel BUG at skbuff.c:316!
invalid operand: 0000
CPU: 0
EIP: 0010:[<c01c514c>]
EFLAGS: 00010286
eax: 0000001c ebx: c032a6ec ecx: c025dddc edx: 0001c482
esi: c30ecc20 edi: c01c8f15 ebp: 00000046 esp: c0275f5c
ds: 0018 es: 0018 ss: 0018
Stack: c0241fa0 0000013c fffffff9 c01c8f15 c30ecc20 00000003 c032a5c8 fffffff9
c0118933 c032a5c8 c0275fac 00000009 c0328a20 c49bbe80 c010870c c0274000
c0105380 c0274000 0008e000 c0211784 c0274000 00000000 00000019 c0105380
Call Trace: [<c01c8f15>] [<c0118933>] [<c010870c>] [<c0105380>] [<c0105380>]
[<c01053a4>] [<c0105412>] [<c0105000>]

Code: 0f 0b 5f 58 8b 54 24 08 8b 42 28 85 c0 74 07 ff 48 04 8b 54
<0>Kernel panic: Aiee, killing interrupt handler!
In interrupt handler - not syncing


[ENVIRONMENT]
The following information was taken from the machine after installing the
working kernel (2.4.3-20mdk).


[HARDWARE]
The machine is (I believe) a stock Compaq Prosignia 300. To it, I have
added two network cards. One requires the 3c59x driver. The other
is the Phoneline card, product #HPN200. It requires the il driver.


[SOFTWARE]
The source for the il driver, installation information, etc. is available
at <http://www.homepna.org/support/faqs.asp#FAQ6>.


[/proc/cpuinfo]
processor : 0
vendor_id : GenuineIntel
cpu family : 5
model : 2
model name : Pentium 75 - 200
stepping : 6
cpu MHz : 120.275
fdiv_bug : no
hlt_bug : no
f00f_bug : yes
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr mce cx8
bogomips : 240.02


[/proc/meminfo]
total: used: free: shared: buffers: cached:
Mem: 96972800 94801920 2170880 0 19791872 50110464
Swap: 197365760 0 197365760
MemTotal: 94700 kB
MemFree: 2120 kB
MemShared: 0 kB
Buffers: 19328 kB
Cached: 48936 kB
Active: 7564 kB
Inact_dirty: 58652 kB
Inact_clean: 2048 kB
Inact_target: 0 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 94700 kB
LowFree: 2120 kB
SwapTotal: 192740 kB
SwapFree: 192740 kB


[/proc/modules]
il 57952 1
ipt_TOS 912 22 (autoclean)
ipt_MASQUERADE 1104 1 (autoclean)
ipt_state 576 3 (autoclean)
ipt_REJECT 1888 9 (autoclean)
ipt_LOG 3120 9 (autoclean)
ipt_limit 864 3 (autoclean)
iptable_nat 11616 0 (autoclean) [ipt_MASQUERADE]
ip_conntrack 12096 2 (autoclean) [ipt_MASQUERADE ipt_state iptable_nat]
iptable_mangle 1680 0 (autoclean) (unused)
iptable_filter 1696 0 (autoclean) (unused)
ip_tables 10528 11 [ipt_TOS ipt_MASQUERADE ipt_state ipt_REJECT ipt_LOG ipt_limit iptable_nat iptable_mangle iptable_filter]
nls_iso8859-1 2848 1 (autoclean)
sr_mod 13952 1 (autoclean)
isofs 17808 1 (autoclean)
af_packet 11280 1 (autoclean)
3c59x 24640 1 (autoclean)
pcnet32 11728 1 (autoclean)
supermount 32496 4 (autoclean)
53c7,8xx 52072 4
sd_mod 11048 3
scsi_mod 86036 3 [sr_mod 53c7,8xx sd_mod]


[/proc/ioports]
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
03c0-03df : vga+
03f8-03ff : serial(auto)
0cf8-0cff : PCI conf1
7000-701f : Advanced Micro Devices [AMD] 79c970 [PCnet LANCE]
7000-701f : PCnet/PCI 79C970
7100-71ff : Symbios Logic Inc. (formerly NCR) 53c810
7100-717f : ncr53c7,8xx
7200-727f : 3Com Corporation 3c900B-TPO [Etherlink XL TPO]
7200-727f : eth1


[/proc/iomem]
00000000-0009efff : System RAM
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000f0000-000fffff : System ROM
00100000-05ffffff : System RAM
00100000-001f412b : Kernel code
001f412c-0023bfab : Kernel data
06200000-062000ff : Symbios Logic Inc. (formerly NCR) 53c810
06300000-0630007f : 3Com Corporation 3c900B-TPO [Etherlink XL TPO]
06400000-06400fff : PCI device feda:a0fa (Epigram Inc)


[/proc/pci]
PCI devices found:
Bus 0, device 11, function 0:
Ethernet controller: Advanced Micro Devices [AMD] 79c970 [PCnet LANCE] (rev 2).
IRQ 3.
I/O at 0x7000 [0x701f].
Bus 0, device 12, function 0:
SCSI storage controller: Symbios Logic Inc. (formerly NCR) 53c810 (rev 2).
IRQ 11.
Master Capable. Latency=255.
I/O at 0x7100 [0x71ff].
Non-prefetchable 32 bit memory at 0x6200000 [0x62000ff].
Bus 0, device 13, function 0:
Ethernet controller: PCI device feda:a0fa (Epigram Inc) (rev 1).
IRQ 9.
Master Capable. Latency=64.
Non-prefetchable 32 bit memory at 0x6400000 [0x6400fff].
Bus 0, device 14, function 0:
Ethernet controller: 3Com Corporation 3c900B-TPO [Etherlink XL TPO] (rev 4).
IRQ 5.
Master Capable. Latency=64. Min Gnt=10.Max Lat=48.
I/O at 0x7200 [0x727f].
Non-prefetchable 32 bit memory at 0x6300000 [0x630007f].
Bus 0, device 15, function 0:
EISA bridge: Compaq Computer Corporation PCI to EISA Bridge (rev 7).
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